Semtech GS12281

12G UHD-SDI Reclocking Cable Driver

The GS12281 is a low-power, multi-rate, re-timing cable driver supporting rates up to 12G UHD-SDI. It is designed to receive 100Ω differential input signals, automatically recover the embedded clock from the digital video signal and re-time the incoming data, and transmit the re-timed signal over 75Ω coaxial cables.

The 100Ω trace input supports up to 17dB of insertion loss.The device supports SMPTE ST 2082-1 (12G UHD-SDI), ST 2081-1 (6G UHD-SDI), ST 424 (3G SDI), ST 292-1 (HD-SDI) and ST 259 (SD-SDI). In addition to standard SMPTE rates, the device also supports re-timing of DVB-ASI at 270Mb/s, MADI at 125Mb/s, and 10GbE. The two cable drivers have highly configurable pre-emphasis and swing controls to compensate for long trace and connector losses. Additionally, automatic and user selectable output slew rate control is provided for each cable driver output.

Features

• Dual non-inverted 75Ω cable interface with on-chip termination
• SMPTE ST 2082-1, ST 2081-1, ST 424, ST 292-1 and ST 259 compliant input/output
• Multi-standard operation from 1Mb/s to 11.88Gb/s
• In addition to standard SMPTE rates, the device also supports re-timing of DVB-ASI at 270Mb/s, and MADI at 125Mb/s.
• 3D Input Signal Eye Monitor
• PRBS generator and checker
• Cable driver mode features:
  • Wide swing control
  • Pre-emphasis to compensate for significant insertion loss between device output and BNC
  • Automatic/manual output slew rate control
  • Manual or automatic re-timer bypass
  • Manual or automatic Mute or disable on LOS
• Trace equalizer features:
  • Integrated 100Ω, differential input termination
  • Automatic power down on loss of signal
  • Adjustable carrier detect threshold
  • DC-coupling from 1.2V to 2.5V CML logic
  • Trace equalization to compensate for up to 20” FR4 at 11.88Gb/s
  • Automatic input offset compensation
• CDR features:
  • Manual or automatic rate modes
  • Wide Loop bandwidth control
  • Re-timing at the following data rates: 125Mb/s, 270Mb/s, 1.485Gb/s, 2.97Gb/s, 5.94Gb/s, and 11.88Gb/s. This includes the f/1.001 rates.
• Single 1.8V power supply for analog and digital core
• 2.5V or 3.3V for cable driver output supply
• GSPI serial control and monitoring interface
• Four configurable GPIO pins for control or status monitoring
• Wide operating temperature range: -40ºC to +85ºC
• Small 6mm x 4mm 40-pin QFN
• Pin compatible with the GS12181, GS12182, GS12081, and GS3281
• Pb-free/Halogen-free/RoHS and WEEE compliant package

Applications

• Next Generation 3D / 2D HFR HDTV and 2K D-Cinema, UHDTV1 and 4K D-Cinema end-equipment: Cameras, Monitors, Switchers, etc.
• Next Generation 3G, 6G, and 12G UHD-SDI infrastructures designed in support of UHDTV1, UHDTV2, 4K D-Cinema and 3D HFR and HDR production image formats.